chrome/browser/ui/panels/display_settings_provider_win.h

   1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #ifndef CHROME_BROWSER_UI_PANELS_DISPLAY_SETTINGS_PROVIDER_WIN_H_
   6 #define CHROME_BROWSER_UI_PANELS_DISPLAY_SETTINGS_PROVIDER_WIN_H_
   7
   8 #include "chrome/browser/ui/panels/display_settings_provider.h"
   9
  10 #include <windows.h>
  11 #include "base/compiler_specific.h"
  12 #include "base/timer/timer.h"
  13
  14 class DisplaySettingsProviderWin : public DisplaySettingsProvider {
  15  public:
  16   DisplaySettingsProviderWin();
  17   virtual ~DisplaySettingsProviderWin();
  18
  19  protected:
  20   // Overridden from DisplaySettingsProvider:
  21   virtual void OnDisplaySettingsChanged() OVERRIDE;
  22   virtual bool IsAutoHidingDesktopBarEnabled(
  23       DesktopBarAlignment alignment) OVERRIDE;
  24   virtual int GetDesktopBarThickness(
  25       DesktopBarAlignment alignment) const OVERRIDE;
  26   virtual DesktopBarVisibility GetDesktopBarVisibility(
  27       DesktopBarAlignment alignment) const OVERRIDE;
  28
  29   int GetDesktopBarThicknessFromBounds(
  30       DesktopBarAlignment alignment, const gfx::Rect& taskbar_bounds) const;
  31   DesktopBarVisibility GetDesktopBarVisibilityFromBounds(
  32       DesktopBarAlignment alignment, const gfx::Rect& taskbar_bounds) const;
  33
  34  private:
  35   struct Taskbar {
  36     HWND window;
  37     DesktopBarVisibility visibility;
  38     int thickness;
  39   };
  40
  41   // Callback to perform periodic check for taskbar changes.
  42   void OnPollingTimer();
  43
  44   // Returns true if there is at least one auto-hiding taskbar found.
  45   bool CheckTaskbars(bool notify_observer);
  46
  47   gfx::Rect GetBounds(DesktopBarAlignment alignment) const;
  48
  49   // Maximum number of taskbars we're interested in: bottom, left, and right.
  50   static const int kMaxTaskbars = 3;
  51
  52   HMONITOR monitor_;
  53   Taskbar taskbars_[kMaxTaskbars];
  54   base::RepeatingTimer<DisplaySettingsProviderWin> polling_timer_;
  55
  56   DISALLOW_COPY_AND_ASSIGN(DisplaySettingsProviderWin);
  57 };
  58
  59 #endif  // CHROME_BROWSER_UI_PANELS_DISPLAY_SETTINGS_PROVIDER_WIN_H_